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Detecting and monitoring cracks in aerospace materials using post-processing of TSA and AE data

Middleton, Ceri A., McCrory, John P., Greene, Richard J., Holford, Karen ORCID: https://orcid.org/0000-0002-3239-4660 and Patterson, Eann A. 2019. Detecting and monitoring cracks in aerospace materials using post-processing of TSA and AE data. Metals 9 (7) , p. 748. 10.3390/met9070748

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Abstract

Thermoelastic stress analysis (TSA) is a non-contact technique for measuring the distribution of stress in the surface of a component subject to cyclic loading by using a sensitive infrared camera. The stress concentrations indicative of a crack can be located and tracked using an optical flow method, allowing the position of the crack-tip to be identified at a given time. Acoustic emission (AE) has been used to validate the TSA algorithm. AE events from cracking, located using the Delta-T Mapping method, were detected several seconds before the TSA algorithm first detected cracking; however, TSA provided significantly more accurate location information.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: MDPI
ISSN: 2075-4701
Funders: EU Framework Programme for Research and Innovation Horizon 2020 Clean Sky 2 and Cardiff University
Date of First Compliant Deposit: 29 July 2019
Date of Acceptance: 4 July 2019
Last Modified: 26 Oct 2022 07:18
URI: https://orca.cardiff.ac.uk/id/eprint/124533

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